/*
 * Copyright (c) 2010, Michael Hengler (developer (at) hengler (dot) de),
 * Nikolaus Moll (developer (at) miblounge (dot) net).
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the Jombi project nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL JOMBI BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package net.miblounge.jombi.impl.widgets;

import net.miblounge.jombi.impl.util.ColorConvert;
import net.miblounge.jombi.impl.util.FontProvider;
import net.miblounge.jombi.impl.util.StringComparator;
import net.miblounge.jombi.impl.util.StyleSheetInvoker;

import org.jowidgets.common.color.IColorConstant;
import org.jowidgets.common.types.Markup;
import org.jowidgets.common.verify.IInputVerifier;
import org.jowidgets.spi.impl.mask.TextMaskVerifierFactory;
import org.jowidgets.spi.impl.verify.InputVerifierHelper;
import org.jowidgets.spi.widgets.setup.ITextFieldSetupSpi;

import com.trolltech.qt.core.QSize;
import com.trolltech.qt.gui.QLineEdit;
import com.trolltech.qt.gui.QLineEdit.EchoMode;
import com.trolltech.qt.gui.QWidget;

public class TextFieldImpl extends AbstractTextInputControl {

	private static QSize last = null;

	private final IInputVerifier inputVerifier;
	private String oldText = "";

	public TextFieldImpl(final Object parentUiReference, final ITextFieldSetupSpi setup) {
		super(new QLineEdit((QWidget) parentUiReference) {
			@Override
			public QSize sizeHint() {
				if (last == null) {
					last = super.sizeHint();
				}
				return last;
			}
		});

		final IInputVerifier maskVerifier = TextMaskVerifierFactory.create(this, setup.getMask());

		inputVerifier = InputVerifierHelper.getInputVerifier(maskVerifier, setup);

		getUiReference().textChanged.connect(this, "fireContentChangedWrapper(String)");
		registerTextComponent(getUiReference());

		if (setup.isPasswordPresentation()) {
			getUiReference().setEchoMode(EchoMode.Password);
		}

		// Fix for Qt's font inheritance
		getUiReference().setFont(FontProvider.deriveFont(getUiReference().font(), Markup.DEFAULT));
	}

	protected void fireContentChangedWrapper(final String currentText) {
		final StringComparator comparator = new StringComparator(oldText, currentText, getUiReference().cursorPosition());

		if (inputVerifier == null
			|| inputVerifier.verify(currentText, comparator.getText(), comparator.getStart(), comparator.getEnd())) {
			oldText = currentText;
			fireInputChanged();
		} else {
			final int lastPosition = getUiReference().cursorPosition() - comparator.getChangeCount();
			this.setText(oldText);
			getUiReference().setCursorPosition(lastPosition);
		}
	}

	@Override
	public QLineEdit getUiReference() {
		return (QLineEdit) super.getUiReference();
	}

	@Override
	public String getText() {
		return getUiReference().text();
	}

	@Override
	public void setText(final String content) {
		getUiReference().setText(content);
	}

	@Override
	public void setEditable(final boolean editable) {
		getUiReference().setReadOnly(!editable);
	}

	// Qt fix
	@Override
	public void setBackgroundColor(final IColorConstant color) {
		StyleSheetInvoker.addStyleSheet(getUiReference(), "background-color", ColorConvert.convert(color).name());
	}

	@Override
	public void setToolTipText(final String toolTip) {
		getUiReference().setToolTip(toolTip);
	}

	@Override
	public void setSelection(final int start, final int end) {
		final int length = end - start + 1;
		getUiReference().setSelection(start, length);
	}

	@Override
	public void setCaretPosition(final int pos) {
		getUiReference().setCursorPosition(pos);
	}

	@Override
	public int getCaretPosition() {
		return getUiReference().cursorPosition();
	}

	@Override
	protected void fireInputChanged() {
		fireInputChanged(getUiReference().text());
	}

}
